Traditional Looks and Geometry
Maintain those flight characteristics you are used to and ensure easy compatibility with conventional FCs

Lightweight and Durable
NBD found a more forgiving and resilient material that doesn't sacrifice in weight or stiffness. Struts and other key support components have been redesigned to distribute and dissipate stress from crashes and falls.
Easy and Inexpensive
None of this is any good if its super difficult to use and super expensive. Key tolerances have been fine tuned to make installation and removal much easier.